Robust Labeling Methods for Copy Protection of Images. - Gerhard C. Langelaar; Jan C. A. van der Lubbe; Reginald L. Lagendijk (Storage and Retrieval for Image and Video Databases (SPIE), 1997)

Removing spatial spread spectrum watermarks by non-linear filtering. - Gerrit C. Langelaar; Reginald L. Lagendijk; Jan Biemond (EUSIPCO, 1998)

Real-Time Labeling of MPEG-2 Compressed Video. - Gerrit C. Langelaar; Reginald L. Lagendijk; Jan Biemond (J. Vis. Commun. Image Represent., 1998)

Watermarking by DCT coefficient removal: a statistical approach to optimal parameter settings. - Gerhard C. Langelaar; Reginald L. Lagendijk; Jan Biemond (Security and Watermarking of Multimedia Contents, 1999)

Watermarking digital image and video data. A state-of-the-art overview. - Gerrit C. Langelaar; Iwan Setyawan; Reginald L. Lagendijk (IEEE Signal Process. Mag., 2000)

Optimal differential energy watermarking of DCT encoded images and video. - Gerhard C. Langelaar; Reginald L. Lagendijk (IEEE Trans. Image Process., 2001)

Video fingerprinting for live events. - Mehmet Utku Celik; Jaap Haitsma; Pavlo Barvinko; Gerhard C. Langelaar; Martijn Maas (Media Forensics and Security, 2009)